How Required Minimum Distributions Force Retirement Withdrawals

The IRS's Timetable for Your Retirement Savings

For decades, tax-deferred retirement accounts allow contributions to grow without annual taxation. The IRS permits this deferral to encourage retirement saving, not to create permanent tax shelters. Required Minimum Distributions (RMDs) represent the mechanism by which the government eventually collects the taxes it deferred — forcing account owners to withdraw a minimum amount each year beginning at age 73 (under current law as of 2025), converting sheltered growth into taxable income.

The penalty for missing an RMD is 25% of the amount that should have been distributed, reduced to 10% if corrected within two years. On a $50,000 missed RMD, that is a $12,500 penalty before any income tax on the distribution itself. Despite this, the IRS issues thousands of penalty notices annually for missed or miscalculated RMDs, often because account holders did not realize the rules had changed or misunderstood how the calculation works.

Which Accounts Are Subject to RMDs

RMD rules apply to tax-deferred accounts — those funded with pre-tax dollars that have never been subject to income tax. Roth accounts, funded with after-tax dollars, are generally exempt during the original owner's lifetime.

• Subject to RMDs: Traditional IRAs, rollover IRAs, SEP IRAs, SIMPLE IRAs, 401(k) plans, 403(b) plans, 457(b) governmental plans, defined benefit pension plans
• Exempt during owner's lifetime: Roth IRAs (Roth 401(k)s were also exempted from RMDs beginning in 2024 under SECURE 2.0)
• Still-working exception: Employees who continue working past age 73 and own less than 5% of their employer can defer RMDs from their current employer's 401(k) until retirement — but not from IRAs or former employer plans

Multiple IRA accounts can be aggregated: the combined RMD for all traditional IRAs can be satisfied by withdrawing the total from any one or combination of those accounts. This aggregation rule does not apply to 401(k) plans; each 401(k) requires its own separately calculated RMD.

How the RMD Amount Is Calculated

The annual RMD equals the account balance as of December 31 of the prior year divided by a distribution period factor from the IRS Uniform Lifetime Table (or Joint Life Expectancy Table if the sole beneficiary is a spouse more than 10 years younger). The factors decrease with age, meaning larger percentages must be withdrawn each year as the account owner ages.

Example calculation: An 80-year-old with a $500,000 traditional IRA balance as of December 31 of the prior year must withdraw $500,000 ÷ 20.2 = $24,752 during the current calendar year. If the account earned returns and grew to $550,000 by year-end, the following year's RMD would be recalculated using the new December 31 balance and the factor for age 81.

The First RMD and the April 1 Rule

The first RMD can be deferred until April 1 of the year following the year the account owner turns 73 — but doing so requires taking two distributions in that second year: the deferred first-year RMD and the regular second-year RMD. Two distributions in one year can push the taxpayer into a higher bracket or trigger other income-related consequences.

• Taking the first RMD in the year the owner turns 73 avoids the double-distribution year and is usually tax-advantageous
• Social Security benefits can become taxable when combined income (including RMDs) exceeds $25,000 single or $32,000 married
• Medicare Part B and D premiums use a two-year lookback through IRMAA (Income-Related Monthly Adjustment Amount); large RMDs in one year can increase premiums two years later
• Net investment income tax (3.8%) can be triggered when modified adjusted gross income exceeds $200,000 single or $250,000 married

Strategies to Manage the RMD Burden

RMDs are not entirely inflexible. Several legal strategies reduce their long-term tax impact, though most require action years or decades before RMDs begin.

Roth conversions represent the primary tool. Converting traditional IRA funds to Roth in the years between retirement and age 73 — often called the "conversion window" — reduces the traditional IRA balance subject to future RMDs. Each dollar converted reduces future mandatory withdrawals, potentially keeping the account owner in lower brackets and reducing IRMAA exposure indefinitely.

Qualified Charitable Distributions (QCDs) allow IRA owners aged 70½ or older to direct up to $105,000 per year (2024, indexed for inflation) from their IRA directly to a qualified charity. The distribution satisfies RMD requirements but is excluded from taxable income — effectively a deduction that benefits even taxpayers who take the standard deduction.

RMD Aggregation and Inherited Account Rules

Account aggregation rules determine which RMDs can be combined and which must remain separate. Traditional IRA RMDs can be taken from any combination of IRAs owned by the same individual. However, IRA RMDs cannot be combined with 401(k) RMDs, and 401(k) RMDs from different employers cannot be combined with each other.

Inherited IRAs follow different distribution rules after the SECURE Act (see separate coverage). The original owner's RMD for the year of death must be taken if it has not been already — this obligation passes to the beneficiary and cannot be skipped, even if the beneficiary plans to distribute the entire inherited account over 10 years.

This article is for informational purposes only and does not constitute financial advice.